/* 基础样式复位及变量声明 */
    :root {
      --primary-color: #1e3a8a;       /* 宝蓝 */
      --primary-light: #3b82f6;     /* 明艳蓝 */
      --accent-color: #06b6d4;      /* 青绿 */
      --bg-light: #f8fafc;          /* 浅灰白 */
      --text-dark: #0f172a;         /* 深灰 */
      --text-light: #64748b;        /* 灰 */
      --border-color: #e2e8f0;      /* 边框色 */
      --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
      --card-shadow-hover: 0 20px 25px -5px rgba(30, 58, 138, 0.1), 0 8px 10px -6px rgba(30, 58, 138, 0.1);
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
      color: var(--text-dark);
      background-color: var(--bg-light);
    }
    
    body {
      line-height: 1.6;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.3s ease;
    }

    /* 布局容器 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 10px rgba(0,0,0,0.05);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }

    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .brand img.ai-page-logo {
      height: 40px;
      width: auto;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: bold;
      color: var(--primary-color);
    }

    .nav-menu {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .nav-item {
      font-size: 0.95rem;
      color: var(--text-dark);
      font-weight: 500;
    }

    .nav-item:hover {
      color: var(--primary-light);
    }

    .nav-btn {
      background: var(--primary-light);
      color: #fff;
      padding: 8px 18px;
      border-radius: 6px;
      font-weight: 600;
      font-size: 0.9rem;
    }

    .nav-btn:hover {
      background: var(--primary-color);
      transform: translateY(-1px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--primary-color);
      cursor: pointer;
    }

    /* 移动端下拉 */
    .mobile-nav {
      display: none;
      background: #fff;
      border-bottom: 1px solid var(--border-color);
      padding: 15px 20px;
    }

    .mobile-nav.open {
      display: block;
    }

    .mobile-nav-item {
      display: block;
      padding: 10px 0;
      border-bottom: 1px dashed var(--border-color);
      font-size: 1rem;
    }

    /* 全局模块通用标题 */
    section {
      padding: 80px 0;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-subtitle {
      font-size: 0.9rem;
      color: var(--primary-light);
      text-transform: uppercase;
      font-weight: bold;
      letter-spacing: 2px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 2.2rem;
      color: var(--primary-color);
      font-weight: 800;
    }

    /* Hero 首屏 - 禁用图片，纯色/渐变/几何/动效样式 */
    .hero-section {
      background: radial-gradient(circle at 10% 20%, rgba(30, 58, 138, 0.05) 0%, rgba(6, 182, 212, 0.03) 90%), #ffffff;
      padding: 120px 0 100px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-content {
      max-width: 850px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      background: rgba(59, 130, 246, 0.1);
      color: var(--primary-light);
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: bold;
      display: inline-block;
      margin-bottom: 25px;
      border: 1px solid rgba(59, 130, 246, 0.2);
    }

    .hero-title {
      font-size: 2.8rem;
      line-height: 1.25;
      color: var(--primary-color);
      font-weight: 850;
      margin-bottom: 20px;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-light);
      margin-bottom: 35px;
      line-height: 1.8;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 15px;
      flex-wrap: wrap;
    }

    .btn-main {
      background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
      color: #fff;
      padding: 14px 30px;
      border-radius: 8px;
      font-weight: bold;
      font-size: 1.1rem;
      box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
    }

    .btn-main:hover {
      box-shadow: 0 6px 20px rgba(59, 130, 246, 0.45);
      transform: translateY(-2px);
    }

    .btn-sub {
      background: #fff;
      color: var(--primary-color);
      border: 1px solid var(--primary-color);
      padding: 14px 30px;
      border-radius: 8px;
      font-weight: bold;
      font-size: 1.1rem;
    }

    .btn-sub:hover {
      background: rgba(30, 58, 138, 0.04);
      transform: translateY(-2px);
    }

    /* 数据指标卡片 */
    .stats-section {
      background: #fff;
      padding: 40px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 30px;
      text-align: center;
    }

    .stat-item {
      padding: 20px;
    }

    .stat-num {
      font-size: 2.8rem;
      font-weight: 850;
      color: var(--primary-light);
      line-height: 1;
      margin-bottom: 10px;
    }

    .stat-label {
      font-size: 0.95rem;
      color: var(--text-light);
      font-weight: 500;
    }

    /* 关于我们（平台介绍） */
    .about-section {
      background: #ffffff;
    }

    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .about-info h3 {
      font-size: 1.8rem;
      color: var(--primary-color);
      margin-bottom: 15px;
      font-weight: 700;
    }

    .about-info p {
      color: var(--text-light);
      margin-bottom: 20px;
      font-size: 1.05rem;
    }

    .about-features {
      list-style: none;
    }

    .about-features li {
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 500;
      color: var(--text-dark);
    }

    .about-features li::before {
      content: "✓";
      color: var(--accent-color);
      font-weight: bold;
    }

    .about-img-wrap {
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }

    .about-img-wrap img {
      width: 100%;
      display: block;
      height: auto;
      object-fit: cover;
    }

    /* AIGC 服务能力卡片 */
    .service-section {
      background: var(--bg-light);
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .service-card {
      background: #fff;
      padding: 30px;
      border-radius: 10px;
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
      border: 1px solid transparent;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-shadow-hover);
      border-color: rgba(59, 130, 246, 0.15);
    }

    .service-icon {
      width: 50px;
      height: 50px;
      background: rgba(6, 182, 212, 0.1);
      color: var(--accent-color);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-size: 1.25rem;
      color: var(--primary-color);
      margin-bottom: 12px;
      font-weight: 700;
    }

    .service-card p {
      color: var(--text-light);
      font-size: 0.95rem;
    }

    /* 一站式制作 */
    .workflow-section {
      background: #ffffff;
    }

    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 30px;
    }

    .workflow-card {
      background: var(--bg-light);
      padding: 30px;
      border-radius: 12px;
      position: relative;
    }

    .workflow-step {
      font-size: 3rem;
      font-weight: 850;
      color: rgba(30, 58, 138, 0.05);
      position: absolute;
      top: 10px;
      right: 20px;
      line-height: 1;
    }

    .workflow-card h3 {
      font-size: 1.2rem;
      color: var(--primary-color);
      margin-bottom: 10px;
      margin-top: 10px;
    }

    .workflow-card p {
      color: var(--text-light);
      font-size: 0.9rem;
    }

    /* 对比评测表格 */
    .compare-section {
      background: var(--bg-light);
    }

    .compare-card {
      background: #fff;
      border-radius: 16px;
      box-shadow: var(--card-shadow);
      padding: 40px;
      overflow-x: auto;
    }

    .compare-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 20px;
    }

    .score-badge {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .score-num {
      font-size: 3rem;
      font-weight: 850;
      color: var(--primary-light);
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.5rem;
    }

    .table-container {
      width: 100%;
      min-width: 700px;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    th, td {
      padding: 16px;
      border-bottom: 1px solid var(--border-color);
    }

    th {
      font-weight: 700;
      color: var(--primary-color);
      background-color: var(--bg-light);
    }

    td.highlight {
      font-weight: 600;
      color: var(--primary-light);
    }

    /* Token比价 */
    .token-section {
      background: #ffffff;
    }

    .token-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
    }

    .token-card {
      background: var(--bg-light);
      border-radius: 10px;
      padding: 25px;
      border: 1px solid var(--border-color);
      transition: all 0.3s;
    }

    .token-card:hover {
      border-color: var(--primary-light);
      background: #fff;
    }

    .token-name {
      font-size: 1.2rem;
      font-weight: bold;
      color: var(--primary-color);
      margin-bottom: 15px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .token-price {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--accent-color);
    }

    .token-features {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-top: 15px;
      padding-top: 15px;
      border-top: 1px solid var(--border-color);
    }

    /* 人工智能培训 */
    .train-section {
      background: var(--bg-light);
    }

    .train-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

    .train-card {
      background: #fff;
      padding: 25px;
      border-radius: 8px;
      box-shadow: var(--card-shadow);
      text-align: center;
      transition: transform 0.3s;
    }

    .train-card:hover {
      transform: translateY(-3px);
    }

    .train-icon {
      font-size: 2rem;
      margin-bottom: 15px;
      display: inline-block;
    }

    .train-title {
      font-size: 1.1rem;
      font-weight: bold;
      color: var(--primary-color);
      margin-bottom: 8px;
    }

    .train-desc {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* 客户案例中心 */
    .cases-section {
      background: #ffffff;
    }

    .cases-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 30px;
    }

    .case-card {
      background: var(--bg-light);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }

    .case-img {
      height: 200px;
      overflow: hidden;
    }

    .case-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-info {
      padding: 25px;
    }

    .case-tag {
      background: var(--primary-color);
      color: #fff;
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }

    .case-title {
      font-size: 1.2rem;
      font-weight: bold;
      color: var(--primary-color);
      margin-bottom: 10px;
    }

    .case-desc {
      font-size: 0.9rem;
      color: var(--text-light);
    }

    /* 常见用户问题 FAQ */
    .faq-section {
      background: var(--bg-light);
    }

    .faq-wrap {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px;
      font-weight: 600;
      color: var(--primary-color);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.3s;
    }

    .faq-question:hover {
      background: rgba(59, 130, 246, 0.02);
    }

    .faq-answer {
      padding: 0 20px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease-out;
      color: var(--text-light);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 0 20px 20px 20px;
      max-height: 200px;
      border-top: 1px solid var(--border-color);
    }

    .faq-icon::after {
      content: '+';
      font-size: 1.2rem;
      font-weight: bold;
    }

    .faq-item.active .faq-icon::after {
      content: '−';
    }

    /* 用户评论 */
    .reviews-section {
      background: #ffffff;
    }

    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
    }

    .review-card {
      background: var(--bg-light);
      padding: 30px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
    }

    .review-text {
      font-style: italic;
      color: var(--text-dark);
      margin-bottom: 20px;
      font-size: 0.95rem;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .user-info h4 {
      font-size: 1rem;
      color: var(--primary-color);
      font-weight: bold;
    }

    .user-info span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 行业解决方案与AI术语百科（标签云） */
    .info-section {
      background: var(--bg-light);
    }

    .tag-cloud-wrap {
      background: #fff;
      padding: 30px;
      border-radius: 12px;
      box-shadow: var(--card-shadow);
      margin-bottom: 40px;
    }

    .tag-title {
      font-size: 1.25rem;
      color: var(--primary-color);
      font-weight: bold;
      margin-bottom: 20px;
      border-left: 4px solid var(--primary-light);
      padding-left: 10px;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .tag-item {
      background: var(--bg-light);
      color: var(--text-dark);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      border: 1px solid var(--border-color);
      transition: all 0.3s;
    }

    .tag-item:hover {
      background: var(--primary-light);
      color: #fff;
      border-color: var(--primary-light);
    }

    /* 智能需求匹配与联系我们表单 */
    .contact-section {
      background: #ffffff;
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
    }

    .contact-info-wrap {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-detail {
      margin-bottom: 30px;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 15px;
      margin-bottom: 20px;
    }

    .contact-icon {
      font-size: 1.5rem;
      color: var(--primary-light);
    }

    .qr-group {
      display: flex;
      gap: 30px;
      margin-top: 20px;
      flex-wrap: wrap;
    }

    .qr-item {
      text-align: center;
    }

    .qr-item img {
      width: 130px;
      height: 130px;
      border: 1px solid var(--border-color);
      padding: 5px;
      background: #fff;
      border-radius: 6px;
    }

    .qr-label {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-top: 8px;
      font-weight: 500;
    }

    .form-wrap {
      background: var(--bg-light);
      padding: 40px;
      border-radius: 12px;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-color);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--primary-color);
    }

    .form-control {
      width: 100%;
      padding: 12px 15px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.95rem;
      background: #fff;
      color: var(--text-dark);
      transition: border 0.3s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-light);
    }

    .form-btn {
      width: 100%;
      background: var(--primary-color);
      color: #fff;
      padding: 14px;
      border: none;
      border-radius: 6px;
      font-weight: bold;
      font-size: 1rem;
      cursor: pointer;
      transition: background 0.3s;
    }

    .form-btn:hover {
      background: var(--primary-light);
    }

    /* 页脚 */
    footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      font-size: 0.9rem;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #f8fafc;
      font-size: 1rem;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 12px;
    }

    .footer-links a {
      color: #94a3b8;
    }

    .footer-links a:hover {
      color: #fff;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 30px;
      text-align: center;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .footer-friends {
      display: flex;
      gap: 15px;
      flex-wrap: wrap;
      justify-content: center;
      font-size: 0.8rem;
    }

    .footer-friends a {
      color: #64748b;
    }

    .footer-friends a:hover {
      color: #94a3b8;
    }

    /* 浮动客服入口 */
    .float-contact {
      position: fixed;
      right: 20px;
      bottom: 20px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-item {
      background: var(--primary-color);
      color: #fff;
      width: 50px;
      height: 50px;
      border-radius: 50px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 10px rgba(0,0,0,0.15);
      cursor: pointer;
      position: relative;
    }

    .float-item:hover {
      background: var(--primary-light);
    }

    .float-item .popover {
      display: none;
      position: absolute;
      bottom: 60px;
      right: 0;
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 15px;
      box-shadow: var(--card-shadow);
      text-align: center;
      min-width: 150px;
    }

    .float-item:hover .popover {
      display: block;
    }

    .float-item .popover img {
      width: 120px;
      height: 120px;
      display: block;
      margin: 0 auto 5px auto;
    }

    .float-item .popover span {
      color: var(--text-dark);
      font-size: 0.8rem;
      font-weight: 500;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .about-grid, .contact-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 2.2rem;
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      section {
        padding: 50px 0;
      }
      .section-title {
        font-size: 1.8rem;
      }
    }